Glee 100th Episode Spoilers: Everything We Know About Rachel

Glee's 100th episode is going to be a big one for Rachel, who is heading back to McKinley's choir room to reunite with all her pals. But what else will Rachel (Lea Michele) be doing in Season 5, Episode 12: "100"? Here's a round-up of everything we know so far!

Lea posted photos of herself singing in the choir room as April Rhodes (Kristin Chenoweth) and Schue (Matthew Morrison) watch. We don't yet know which solo song she's singing here, but it doesn't appear to be a cheery one.

The episode will feature a lot of previously covered Glee songs being redone in new ways. One of those is reportedly going to feature Rachel joining a few pals on this tune, which she knocked out of the park in the early days of Glee.

We love seeing Rachel back at McKinley, especially because it gives us the chance to see silly backstage photos of Lea with cast members whom she doesn't usually film with. How cute is this pic of Lea with Heather Morris (Brittany) and another lovely Glee star?